if you are talking about on the fuel gauge in the car, there is a float(part of the pump) that rises and the sensor registers it on the dashboard.
But if you are refering at the gas sation, then there is a small hole in the nozzel which works based on the amount or air in the tank
A gas tank can indeed overflow if it is not full. A gas tank can overflow if the pressure inside of it is too high.
The sending unit in the gas tank is bad.
Your gas tank is Full 'you have gas' full
How many miles on a full tank of gas for 1997 Chevy Malibu
You can put about a pint in a full tank of gas.
from what i hear this can happen when someone tries to syphon your gas tank it breaks the little meter inside your tank
No
For long term storage, keep it full.
How many miles does a full tank of gas get in a 2001 Alero Oldsmobile car
You need to siphon it out. You'll also need several gas cans if the tank is full.
The 1995 Astro van on a full tank of gas can travel for about 500 miles.
It may be a problem with the sensor, which is located in the gas tank itself. If this is the case, the gas tank will have to be removed and exchanged for a tank with a working sensor. Needless to say, this is a job for a mechanic with a lift available.